ESKILSTUNA, a town of Sweden in the government of Sodermanland, anddistrict of Nykoping, on the Ujelmar-Ac, which unites Lake Hjelmar with Lake Maier. It is the principal centre of Swedish manufacturing industry, possessing a royal musket-factory, engineering works, cutlery establishments, needle factories, dye-works, and tanneries. The place is mentioned in the 13th century, and is said to derive its name from an English missionary called Eskil who suffered martyrdom and was buried on the spot. It rose into importance in the reign of Charles X., who bestowed on it considerable privileges, and gave the first impulse to its manufacturing activity. Population 6130.